So running a program to research the issue: /* show the device fluidsynth connects to (usually "default") */ r = fluid_settings_copystr(settings, "audio.alsa.device", buff, 200); printf("r: %d\n", r); printf("The alsa PCM device for Fluidsynth is: %s\n", buff); r = fluid_settings_copystr(settings, "synth.gain", buff, 200); printf("r: %d\n", r); printf("The gain for Fluidsynth is: %s\n", buff); r = fluid_settings_setstr(settings, "synth.gain", "10"); printf("r: %d\n", r); r = fluid_settings_copystr(settings, "synth.gain", buff, 200); printf("r: %d\n", r); printf("The gain for Fluidsynth is: %s\n", buff); r = fluid_settings_copystr(settings, "nonsense", buff, 200); printf("r: %d\n", r); printf("The gain for Fluidsynth is: %s\n", buff); Result: ./test fluidsynth: warning: Failed to set thread to high priority fluidsynth: warning: Failed to pin the sample data to RAM; swapping is possible. r: 1 The alsa PCM device for Fluidsynth is: default r: 0 The gain for Fluidsynth is: r: 0 r: 0 The gain for Fluidsynth is: r: 0 The gain for Fluidsynth is: So "synth.gain" does not appear to exist. I got this name from: http://www.fluidsynth.org/api/fluidsettings.xml ? --------- Original Message --------- Subject: [fluid-dev] Help with setting volume control From: "scott andrew franco" <sam...@moorecad.com> Date: 7/30/19 6:58 pm To: fluid-dev@nongnu.org
Hi, I am using Fluidsynth library in my program (Petit_ami on sourceforge). It is working well, but my result is very low volume output. A search found many other references to low volume, and the standard answer I found was to turn up the gain on the command line version of fluidsynth (I believe -g or "gain" option). Of course that does not apply to users of fluidsynth as a library. I have had good luck finding various parameters via the settings call. The "synth.gain" parameter should do it: "The gain is applied to the final or master output of the synthesizer. It is set to a low value by default to avoid the saturation of the output when many notes are played." It is 0-10, but is defaulted to 0.2. However, changing this parameter had no effect on the output volume, I tried all the way up to 10. Other details: I am using alsa device. The device it is using (by examining "audio.alsa.device") shows as "default". Any help appreciated. Scott A. Franco San Jose, CA _______________________________________________ fluid-dev mailing list fluid-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/fluid-dev
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